RFR: Add support for bin folder in makefile

Mon May 27 14:20:38 UTC 2024

On Mon, 27 May 2024 14:14:02 GMT, Maurizio Cimadamore <mcimadamore at openjdk.org> wrote:

> A previous PR changed the gradle build to emit launcher scripts in a separate "bin" folder. However, that PR did not make any changes to the makefiles used to produce the binary bundles. This PR rectifies that.
> 
> Tested locally.

Marked as reviewed by jvernee (Committer).

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PR Review: https://git.openjdk.org/jextract/pull/247#pullrequestreview-2081037557